Len Blavatnik’s post-Grammy party was a celebration of his award-winning musicians, but the Warner Music Group owner also invited some Hollywood royalty, including Anjelica Huston and British actress Kate Beckinsale.

Zaslav’s shindig at his Central Park West abode saw Fox News chief Roger Ailes kibitzing with CNN chief Jeff Zucker. The two have been at loggerheads over Fox News accusations that CNN is backing off its mission to cover news.

It wouldn’t be a party unless Harvey Weinstein showed up. The film boss sipped drinks while being pitched by AMC Networks boss Josh Sapan, Showtime chief Matt Blank and Scripps Networks CEO Ken Lowe — with all three arguing over who would get a first look at Weinstein Co.’s next TV series.

Zaslav’s house parties are always a who’s who of the entertainment industry. Newly installed NYPD Commissioner William Bratton flexed his considerable power, greeting hosts David and wife, Pamela, with a joke.

“It’s a good thing I’m the police commissioner, not the fire commissioner,” Bratton quipped.